Parses ffprobe CSV packet output for keyframe timestamps.
Column order follows -show_entries packet=pts_time,flags.
Keyframes carry K in the flags field (e.g. 6.639967,K__). Reading packets
uses the container sync-sample index and does not decode video frames.
Parses ffprobe CSV packet output for keyframe timestamps. Column order follows
-show_entries packet=pts_time,flags. Keyframes carryKin the flags field (e.g.6.639967,K__). Reading packets uses the container sync-sample index and does not decode video frames.